It does what it says, but ...

I AHC20 sensitive first tested because I very strongly to head welding suffering (scalp, neck, temples, forehead, upper lip, neck). The product has already shown significant improvement after the first application.

Disadvantage:
It feels like 100,000 pinpricks on the skin. It itches, scratches and bites, though I very economical deal with it. For neck, temples, forehead, upper lip and neck, I use 3-5 drops on a cotton pad AHC20 sensitive. It costs a lot of mastery, not wild drauf los to scratch. Sometime declines this feeling, but when the next morning to come to the treated areas during washing / showering water, catching the unpleasant pinpricks from scratch. Also this occurs pinpricks feeling from time to time throughout the day on.

Effect: absolutely top
Side effects: some but very uncomfortable